How many Watts can WaterLily produce? Ryan Young May 28, 2019 18:34 Updated Follow WaterLily 12V can produce up to 15W. WaterLily USB can produce up to 15W. Related articles What kind of connectors does WaterLily use? How many Volts can WaterLily produce? How does WaterLily compare to portable solar? Does WaterLily have an internal battery? Do I need a charge controller? Comments 0 comments Please sign in to leave a comment.